clear prop!!!
How can one say its a fact without providing facts? Hearing from a friend of a friend doesn't prove your point I'm afraid.
When you go abroad your phone will connect to the network that has the strongest signal this is the same with Vodafone, Orange, T-Mobile. They all use the same companies within the countries so to be honest it doesn't really matter what network you are with, pricing does matter though.
Lol... so? We have huge businesses using our network as well. Infact we built O2 Airwaves which is used by the emergency services and the army because of its reliability.
I'm not doubting Vodafones service, I know they are very good, but what you must understand is that O2 is up there with them. We are part of the one of the largest mobile phone networks just behind Vodafone and China mobile.